Alternate or blend from the collection of Serum Concentrates to target the specific needs of your skin. Daily Skin-Booster: 2x daily in the palm of your hand, mix 2-3 drops into your lotion. Intensive Treatment: massage a few drops into clean dry skin. For extra hydration, first dampen skin with a toner, then apply a few drops onto wet skin. Alternate or blend from the collection of Serum Concentrates to target the specific needs of your skin.